Five-dimensional unclonable anticounterfeiting orthogonal Raman labels. Issue 18 (22nd April 2022)

• Record Type: Journal Article
• Authors: Li, Jin; He, Chang; Qu, Haijun; Shen, Feng; Ye, Jian
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 18(2022)
• Page Start: 7273
• Page End: 7282
• Publication Date: 2022-04-22
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc05938f
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We present rapid and high-throughput mass production of five-dimensional unclonable security labels consisting of alkyne-decorated Raman tags embedded inside resin-based micropatterns for high-level anticounterfeiting by microfluidic SlipChip. Abstract : The physical unclonable function (PUF) is a cornerstone of information security. Encoding capacity and information density strongly relies on the encoding dimensions of PUF security labels. We herein report the design of orthogonal gap-enhanced Raman tags (O-GERTs) with ultrahigh brightness down to a single-particle level and excellent photostability for a PUF security label by randomly placing O-GERTs into polymer micropatterns. With near-infrared optical excitation, we demonstrate five-dimensional (namely, frequency, intensity and three-dimensional spaces) PUF labels with a super large encoding capacity (∼10 5852 ) and an ultrahigh information density (∼10 5844 Tbit cm −3 ). These PUF labels are digitized from the signals of embedded alkyne Raman reporters in the Raman-silent region, which are anti-interference with the polymer background. Authentication and mechanical bending experiments have revealed the robustness of the PUF labels. Furthermore, microfluidic SlipChip allows rapid (∼10 min) and high-throughput (tens of thousands of units per run) mass production of the labels. Due to the compact micron-scale footprint, these ultrathin PUF labels are finally integrated with Quick Response (QR) codes to afford double-layer information anticounterfeiting.